﻿/*
 * Copyright (c) <2012> <guangboo49@gmail.com>
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this 
 * software and associated documentation files (the "Software"), to deal in the Software 
 * without restriction, including without limitation the rights to use, copy, modify, merge, 
 * publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons 
 * to whom the Software is furnished to do so, subject to the following conditions: 
 * The above copyright notice and this permission notice shall be included in all copies or 
 * substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

using System;

namespace Optparse.Options {
    public class BoolArgOption : ArgOptionBase<bool> {
        public BoolArgOption(string alias, string name, string desc, string helptext) : base(alias, name, desc, helptext) { }
        public BoolArgOption(string alias, string name, string desc, string helptext, bool defaultValue) : base(alias, name, desc, helptext, defaultValue) { }
        
        protected override bool Parse(string optValue, out bool value) {
            if (string.IsNullOrEmpty(optValue)) {
                if (this.ValueRequired) {
                    value = false;
                    return false;
                } else {
                    value = this.Default;
                    return true;
                }
            }
            
            optValue = optValue.ToLower();
            if (optValue == "1" || optValue == "yes" || optValue == "y" || optValue == "t" || optValue == "true") {
                value = true;
                return true;
            } else if (optValue == "0" || optValue == "no" || optValue == "n" || optValue == "f" || optValue == "false") {
                value = false;
                return true;
            } else {
                value = false;
                return false;
            }
        }
    }
}
